Add easier script for non-tv/movie files, and 2 features to control formatting for mp4/mov and mpeg4 files.

* Added baseConvert.py to convert any video file without any
  tagging, directly from sabnzbd.  Recurses directories so can
  call directly to sweep a folder system instead of manual.py
* Added option to control mp4/mov format.  mov format is a problem on
  windows and (some?) android.
* Added option to remux mpeg4 video instead of converting to h264. This
  allows easy conversion from most AVI to MP4 files.  Note that for
  these files the output will always be mp4 format and not mov.
* Reduced default bitrate for AAC output when source is a MP3.  512
  is far too high for the common mp3 128kb source.